煤油是提炼石油的副产品。

Kerosene is a by-product of petroleum refining.

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从油砂中提炼石油比传统的钻取产生更多的碳排放。

Extracting oil from tar sands causes more carbon emissions than traditional drilling.

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最近一期经济学人杂志全面介绍了加拿大用来提炼石油的焦油砂。

THE latest print issue of The Economist features a comprehensive briefing on Canada's oil-producing tar sands.

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